Revert "build(deps-dev): bump svelte-loader from 3.1.5 to 3.1.6 (#648)"

This reverts commit 9b714a925f.

package-lock.json

@@ -10890,9 +10890,9 @@
       "dev": true
     },
     "svelte-loader": {
-      "version": "3.1.6",
-      "resolved": "https://registry.npmjs.org/svelte-loader/-/svelte-loader-3.1.6.tgz",
-      "integrity": "sha512-Jgb51YGjOK3w20hbw8B7jXGX/JA2bJih5kQrvBgn8sNj3Dj0+5jBWsvfp7aUG3CXWSXCa8NejPP4bU6zB+dRNQ==",
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/svelte-loader/-/svelte-loader-3.1.5.tgz",
+      "integrity": "sha512-H1PRX7oqtR5Ry1oMF+Rsco90/UHNevxkjuXkSfJKSB3Ff6vwPvr26ZymVJZwvUvOOODSv/uDapg60kwOJ35H9A==",
       "dev": true,
       "requires": {
         "loader-utils": "^2.0.4",